1 /* ECOFF support on Alpha machines. 2 coff/ecoff.h must be included before this file. 3 4 Copyright (C) 2001-2024 Free Software Foundation, Inc. 5 6 This program is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 3 of the License, or 9 (at your option) any later version. 10 11 This program is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with this program; if not, write to the Free Software 18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 19 MA 02110-1301, USA. */ 20 21 /********************** FILE HEADER **********************/ 22 23 struct external_filehdr 24 { 25 unsigned char f_magic[2]; /* magic number */ 26 unsigned char f_nscns[2]; /* number of sections */ 27 unsigned char f_timdat[4]; /* time & date stamp */ 28 unsigned char f_symptr[8]; /* file pointer to symtab */ 29 unsigned char f_nsyms[4]; /* number of symtab entries */ 30 unsigned char f_opthdr[2]; /* sizeof(optional hdr) */ 31 unsigned char f_flags[2]; /* flags */ 32 }; 33 34 /* Magic numbers are defined in coff/ecoff.h. */ 35 #define ALPHA_ECOFF_BADMAG(x) \ 36 ((x).f_magic != ALPHA_MAGIC && (x).f_magic != ALPHA_MAGIC_BSD) 37 38 #define ALPHA_ECOFF_COMPRESSEDMAG(x) \ 39 ((x).f_magic == ALPHA_MAGIC_COMPRESSED) 40 41 /* The object type is encoded in the f_flags. */ 42 #define F_ALPHA_OBJECT_TYPE_MASK 0x3000 43 #define F_ALPHA_NO_SHARED 0x1000 44 #define F_ALPHA_SHARABLE 0x2000 45 #define F_ALPHA_CALL_SHARED 0x3000 46 47 #define FILHDR struct external_filehdr 48 #define FILHSZ 24 49 50 /********************** AOUT "OPTIONAL HEADER" **********************/ 51 52 typedef struct external_aouthdr 53 { 54 unsigned char magic[2]; /* type of file */ 55 unsigned char vstamp[2]; /* version stamp */ 56 unsigned char bldrev[2]; /* ?? */ 57 unsigned char padding[2]; /* pad to quadword boundary */ 58 unsigned char tsize[8]; /* text size in bytes */ 59 unsigned char dsize[8]; /* initialized data " " */ 60 unsigned char bsize[8]; /* uninitialized data " " */ 61 unsigned char entry[8]; /* entry pt. */ 62 unsigned char text_start[8]; /* base of text used for this file */ 63 unsigned char data_start[8]; /* base of data used for this file */ 64 unsigned char bss_start[8]; /* base of bss used for this file */ 65 unsigned char gprmask[4]; /* bitmask of general registers used */ 66 unsigned char fprmask[4]; /* bitmask of floating point registers used */ 67 unsigned char gp_value[8]; /* value for gp register */ 68 } AOUTHDR; 69 70 /* compute size of a header */ 71 72 #define AOUTSZ 80 73 #define AOUTHDRSZ 80 74 75 /********************** SECTION HEADER **********************/ 76 77 struct external_scnhdr 78 { 79 unsigned char s_name[8]; /* section name */ 80 unsigned char s_paddr[8]; /* physical address, aliased s_nlib */ 81 unsigned char s_vaddr[8]; /* virtual address */ 82 unsigned char s_size[8]; /* section size */ 83 unsigned char s_scnptr[8]; /* file ptr to raw data for section */ 84 unsigned char s_relptr[8]; /* file ptr to relocation */ 85 unsigned char s_lnnoptr[8]; /* file ptr to line numbers */ 86 unsigned char s_nreloc[2]; /* number of relocation entries */ 87 unsigned char s_nlnno[2]; /* number of line number entries*/ 88 unsigned char s_flags[4]; /* flags */ 89 }; 90 91 #define SCNHDR struct external_scnhdr 92 #define SCNHSZ 64 93 94 /********************** RELOCATION DIRECTIVES **********************/ 95 96 struct external_reloc 97 { 98 unsigned char r_vaddr[8]; 99 unsigned char r_symndx[4]; 100 unsigned char r_bits[4]; 101 }; 102 103 #define RELOC struct external_reloc 104 #define RELSZ 16 105 106 /* Constants to unpack the r_bits field. The Alpha seems to always be 107 little endian, so I haven't bothered to define big endian variants 108 of these. */ 109 110 #define RELOC_BITS0_TYPE_LITTLE 0xff 111 #define RELOC_BITS0_TYPE_SH_LITTLE 0 112 113 #define RELOC_BITS1_EXTERN_LITTLE 0x01 114 115 #define RELOC_BITS1_OFFSET_LITTLE 0x7e 116 #define RELOC_BITS1_OFFSET_SH_LITTLE 1 117 118 #define RELOC_BITS1_RESERVED_LITTLE 0x80 119 #define RELOC_BITS1_RESERVED_SH_LITTLE 7 120 #define RELOC_BITS2_RESERVED_LITTLE 0xff 121 #define RELOC_BITS2_RESERVED_SH_LEFT_LITTLE 1 122 #define RELOC_BITS3_RESERVED_LITTLE 0x03 123 #define RELOC_BITS3_RESERVED_SH_LEFT_LITTLE 9 124 125 #define RELOC_BITS3_SIZE_LITTLE 0xfc 126 #define RELOC_BITS3_SIZE_SH_LITTLE 2 127 128 /* The r_type field in a reloc is one of the following values. */ 129 #define ALPHA_R_IGNORE 0 130 #define ALPHA_R_REFLONG 1 131 #define ALPHA_R_REFQUAD 2 132 #define ALPHA_R_GPREL32 3 133 #define ALPHA_R_LITERAL 4 134 #define ALPHA_R_LITUSE 5 135 #define ALPHA_R_GPDISP 6 136 #define ALPHA_R_BRADDR 7 137 #define ALPHA_R_HINT 8 138 #define ALPHA_R_SREL16 9 139 #define ALPHA_R_SREL32 10 140 #define ALPHA_R_SREL64 11 141 #define ALPHA_R_OP_PUSH 12 142 #define ALPHA_R_OP_STORE 13 143 #define ALPHA_R_OP_PSUB 14 144 #define ALPHA_R_OP_PRSHIFT 15 145 #define ALPHA_R_GPVALUE 16 146 #define ALPHA_R_GPRELHIGH 17 147 #define ALPHA_R_GPRELLOW 18 148 #define ALPHA_R_IMMED 19 149 150 /* Overloaded reloc value used by Net- and OpenBSD. */ 151 #define ALPHA_R_LITERALSLEAZY 17 152 153 /* With ALPHA_R_LITUSE, the r_size field is one of the following values. */ 154 #define ALPHA_R_LU_BASE 1 155 #define ALPHA_R_LU_BYTOFF 2 156 #define ALPHA_R_LU_JSR 3 157 158 /* With ALPHA_R_IMMED, the r_size field is one of the following values. */ 159 #define ALPHA_R_IMMED_GP_16 1 160 #define ALPHA_R_IMMED_GP_HI32 2 161 #define ALPHA_R_IMMED_SCN_HI32 3 162 #define ALPHA_R_IMMED_BR_HI32 4 163 #define ALPHA_R_IMMED_LO32 5 164 165 /********************** SYMBOLIC INFORMATION **********************/ 166 167 /* Written by John Gilmore. */ 168 169 /* ECOFF uses COFF-like section structures, but its own symbol format. 170 This file defines the symbol format in fields whose size and alignment 171 will not vary on different host systems. */ 172 173 /* File header as a set of bytes */ 174 175 struct hdr_ext 176 { 177 unsigned char h_magic[2]; 178 unsigned char h_vstamp[2]; 179 unsigned char h_ilineMax[4]; 180 unsigned char h_idnMax[4]; 181 unsigned char h_ipdMax[4]; 182 unsigned char h_isymMax[4]; 183 unsigned char h_ioptMax[4]; 184 unsigned char h_iauxMax[4]; 185 unsigned char h_issMax[4]; 186 unsigned char h_issExtMax[4]; 187 unsigned char h_ifdMax[4]; 188 unsigned char h_crfd[4]; 189 unsigned char h_iextMax[4]; 190 unsigned char h_cbLine[8]; 191 unsigned char h_cbLineOffset[8]; 192 unsigned char h_cbDnOffset[8]; 193 unsigned char h_cbPdOffset[8]; 194 unsigned char h_cbSymOffset[8]; 195 unsigned char h_cbOptOffset[8]; 196 unsigned char h_cbAuxOffset[8]; 197 unsigned char h_cbSsOffset[8]; 198 unsigned char h_cbSsExtOffset[8]; 199 unsigned char h_cbFdOffset[8]; 200 unsigned char h_cbRfdOffset[8]; 201 unsigned char h_cbExtOffset[8]; 202 }; 203 204 /* File descriptor external record */ 205 206 struct fdr_ext 207 { 208 unsigned char f_adr[8]; 209 unsigned char f_cbLineOffset[8]; 210 unsigned char f_cbLine[8]; 211 unsigned char f_cbSs[8]; 212 unsigned char f_rss[4]; 213 unsigned char f_issBase[4]; 214 unsigned char f_isymBase[4]; 215 unsigned char f_csym[4]; 216 unsigned char f_ilineBase[4]; 217 unsigned char f_cline[4]; 218 unsigned char f_ioptBase[4]; 219 unsigned char f_copt[4]; 220 unsigned char f_ipdFirst[4]; 221 unsigned char f_cpd[4]; 222 unsigned char f_iauxBase[4]; 223 unsigned char f_caux[4]; 224 unsigned char f_rfdBase[4]; 225 unsigned char f_crfd[4]; 226 unsigned char f_bits1[1]; 227 unsigned char f_bits2[3]; 228 unsigned char f_padding[4]; 229 }; 230 231 #define FDR_BITS1_LANG_BIG 0xF8 232 #define FDR_BITS1_LANG_SH_BIG 3 233 #define FDR_BITS1_LANG_LITTLE 0x1F 234 #define FDR_BITS1_LANG_SH_LITTLE 0 235 236 #define FDR_BITS1_FMERGE_BIG 0x04 237 #define FDR_BITS1_FMERGE_LITTLE 0x20 238 239 #define FDR_BITS1_FREADIN_BIG 0x02 240 #define FDR_BITS1_FREADIN_LITTLE 0x40 241 242 #define FDR_BITS1_FBIGENDIAN_BIG 0x01 243 #define FDR_BITS1_FBIGENDIAN_LITTLE 0x80 244 245 #define FDR_BITS2_GLEVEL_BIG 0xC0 246 #define FDR_BITS2_GLEVEL_SH_BIG 6 247 #define FDR_BITS2_GLEVEL_LITTLE 0x03 248 #define FDR_BITS2_GLEVEL_SH_LITTLE 0 249 250 /* We ignore the `reserved' field in bits2. */ 251 252 /* Procedure descriptor external record */ 253 254 struct pdr_ext { 255 unsigned char p_adr[8]; 256 unsigned char p_cbLineOffset[8]; 257 unsigned char p_isym[4]; 258 unsigned char p_iline[4]; 259 unsigned char p_regmask[4]; 260 unsigned char p_regoffset[4]; 261 unsigned char p_iopt[4]; 262 unsigned char p_fregmask[4]; 263 unsigned char p_fregoffset[4]; 264 unsigned char p_frameoffset[4]; 265 unsigned char p_lnLow[4]; 266 unsigned char p_lnHigh[4]; 267 unsigned char p_gp_prologue[1]; 268 unsigned char p_bits1[1]; 269 unsigned char p_bits2[1]; 270 unsigned char p_localoff[1]; 271 unsigned char p_framereg[2]; 272 unsigned char p_pcreg[2]; 273 }; 274 275 #define PDR_BITS1_GP_USED_BIG 0x80 276 #define PDR_BITS1_REG_FRAME_BIG 0x40 277 #define PDR_BITS1_PROF_BIG 0x20 278 #define PDR_BITS1_RESERVED_BIG 0x1f 279 #define PDR_BITS1_RESERVED_SH_LEFT_BIG 8 280 #define PDR_BITS2_RESERVED_BIG 0xff 281 #define PDR_BITS2_RESERVED_SH_BIG 0 282 283 #define PDR_BITS1_GP_USED_LITTLE 0x01 284 #define PDR_BITS1_REG_FRAME_LITTLE 0x02 285 #define PDR_BITS1_PROF_LITTLE 0x04 286 #define PDR_BITS1_RESERVED_LITTLE 0xf8 287 #define PDR_BITS1_RESERVED_SH_LITTLE 3 288 #define PDR_BITS2_RESERVED_LITTLE 0xff 289 #define PDR_BITS2_RESERVED_SH_LEFT_LITTLE 5 290 291 /* Line numbers */ 292 293 struct line_ext { 294 unsigned char l_line[4]; 295 }; 296 297 /* Symbol external record */ 298 299 struct sym_ext { 300 unsigned char s_value[8]; 301 unsigned char s_iss[4]; 302 unsigned char s_bits1[1]; 303 unsigned char s_bits2[1]; 304 unsigned char s_bits3[1]; 305 unsigned char s_bits4[1]; 306 }; 307 308 #define SYM_BITS1_ST_BIG 0xFC 309 #define SYM_BITS1_ST_SH_BIG 2 310 #define SYM_BITS1_ST_LITTLE 0x3F 311 #define SYM_BITS1_ST_SH_LITTLE 0 312 313 #define SYM_BITS1_SC_BIG 0x03 314 #define SYM_BITS1_SC_SH_LEFT_BIG 3 315 #define SYM_BITS1_SC_LITTLE 0xC0 316 #define SYM_BITS1_SC_SH_LITTLE 6 317 318 #define SYM_BITS2_SC_BIG 0xE0 319 #define SYM_BITS2_SC_SH_BIG 5 320 #define SYM_BITS2_SC_LITTLE 0x07 321 #define SYM_BITS2_SC_SH_LEFT_LITTLE 2 322 323 #define SYM_BITS2_RESERVED_BIG 0x10 324 #define SYM_BITS2_RESERVED_LITTLE 0x08 325 326 #define SYM_BITS2_INDEX_BIG 0x0F 327 #define SYM_BITS2_INDEX_SH_LEFT_BIG 16 328 #define SYM_BITS2_INDEX_LITTLE 0xF0 329 #define SYM_BITS2_INDEX_SH_LITTLE 4 330 331 #define SYM_BITS3_INDEX_SH_LEFT_BIG 8 332 #define SYM_BITS3_INDEX_SH_LEFT_LITTLE 4 333 334 #define SYM_BITS4_INDEX_SH_LEFT_BIG 0 335 #define SYM_BITS4_INDEX_SH_LEFT_LITTLE 12 336 337 /* External symbol external record */ 338 339 struct ext_ext { 340 struct sym_ext es_asym; 341 unsigned char es_bits1[1]; 342 unsigned char es_bits2[3]; 343 unsigned char es_ifd[4]; 344 }; 345 346 #define EXT_BITS1_JMPTBL_BIG 0x80 347 #define EXT_BITS1_JMPTBL_LITTLE 0x01 348 349 #define EXT_BITS1_COBOL_MAIN_BIG 0x40 350 #define EXT_BITS1_COBOL_MAIN_LITTLE 0x02 351 352 #define EXT_BITS1_WEAKEXT_BIG 0x20 353 #define EXT_BITS1_WEAKEXT_LITTLE 0x04 354 355 /* Dense numbers external record */ 356 357 struct dnr_ext { 358 unsigned char d_rfd[4]; 359 unsigned char d_index[4]; 360 }; 361 362 /* Relative file descriptor */ 363 364 struct rfd_ext { 365 unsigned char rfd[4]; 366 }; 367 368 /* Optimizer symbol external record */ 369 370 struct opt_ext { 371 unsigned char o_bits1[1]; 372 unsigned char o_bits2[1]; 373 unsigned char o_bits3[1]; 374 unsigned char o_bits4[1]; 375 struct rndx_ext o_rndx; 376 unsigned char o_offset[4]; 377 }; 378 379 #define OPT_BITS2_VALUE_SH_LEFT_BIG 16 380 #define OPT_BITS2_VALUE_SH_LEFT_LITTLE 0 381 382 #define OPT_BITS3_VALUE_SH_LEFT_BIG 8 383 #define OPT_BITS3_VALUE_SH_LEFT_LITTLE 8 384 385 #define OPT_BITS4_VALUE_SH_LEFT_BIG 0 386 #define OPT_BITS4_VALUE_SH_LEFT_LITTLE 16 387